如果有itemid 注意1 itemid不是epid注意2 getebaysalelist 返回的itemid不是真的itemid 而是
LegacyId, itemid，是这么表示的
v1|284317379368|0， 284317379368是LegacyId
GetSellerList
buy接口 getItemByLegacyId接口
getItem 接口 https://developer.ebay.com/api-docs/buy/browse/resources/item/methods/getItem
api
https://developer.ebay.com/api-docs/buy/browse/resources/item_summary/methods/search
如果有 refereceid upc
FindItemsByProduct site:developer.ebay.com 需要refereceid upc等
http://developer.ebay.com/devzone/finding/callref/types/ErrorSeverity.html
需要 epid upc等
getProductDetailsRequest site:developer.ebay.com 需要 epid upc等
* http://developer.ebay.com/DevZone/product/CallRef/getProductDetails.html
